3DG1
5
0 2 0
1 0 -1
-1 0 -1
-1 0 1
1 0 1
3 0 1 2 7
3 0 2 3 7
3 0 3 4 7
3 0 4 1 7
4 1 4 3 2 -7
  2
    2 1 3 0
    2 2 4 0
